Condensex



C; D. TUSKA coNDENsER (1D Tus/fa,

Original Filed March 29. 191B Sept. 25 1923.

lllllllllllllllllll C.

nemica seat. 2s, 1923. j y

UNITED STATES-PATENT OFFICE,...

CLARENCE D., TUSKA, 0F HARTFORD, CONNECTICUT, AS'SIGNOR .TO DUBILIER CON- A DENSER AND. RADIO CORPORATION,.OF YORK', N. Y., .A CORPORATION'v OF ST0 whom t may com-em.'-

DELAWARE CONDENSER.

Original No. 1,371,061, datedliarch 8, 192,1, Serial No. 286,190, led March 29, 1919. i Application for reissue 1ed February 21, 1923. Serial No. 620,534.

Be it known'that I, CLARENCE D. TUsKA, a citizen of the United States, residing 'at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Condensers, of which the following is a specification.

`This invention relates to'condensers. A condenser involving the invention maybe employed with utilityin various ways .in

the .electric and allied arts, although in practice it has demonstrated vparticular advan? tage as part of the equipment of a wireless telegraph station. I have several objects in view, among the principal of them being the provision of an appliance of the characterv set forth, which is capable of inexpensive production, without in any wise affecting .its

proper action. The device is comparatively.

ghtj, yet strong, and it can be readily and easily operated to adjust orregulate its cal pacity. It may be constructed in' various ways. In the drawings accompanying and formin part of the 4present specification, I have ilustrated vsomewhat fully and will hereinafter describe in detail several of the many forms of the invention. This'disclosure is primarily made to enable those skilled in the art t'o vracticethe invention. I am not restricted t ereto. I may in fact depart therefrom in several particulars withinthe scope ofthe invention defined by the claims following said description.

.Referring to said drawings- Figure 1 is a top plan View of a condenser involving thel invention.

Fig.-2 is an elevation of the same. Fig. 3 is a" transverse section of the .body part of the condenser.

Fig. 4 is .a daan in sectional elevation,- ofl the lower-part'of the condenser with several 1 justa-ble to vary capacity. This relative .adjustment, as will be inferred," may be obplies folded back andpartly broken away. Fig. 5 is a'plan view of another forni. Fig. 6 is an elevation of the same. Fig. 7 .is anv elevation of af further form of condenser.

Like characters The condenser involves in its makeup at least two elements which are relatively adrefer to like parts .throughout the several views which are on different scales.

a l u l e l tamed 1n 4varlous ways. Usually, 1t is accomprises a plurality. of portions desirably.

flexible. For illustration, I have obtained excellent results by making one portion, that 1s the insulating portion of some fiexible 'ma,

'terial such as paper stock of which there are several kinds. I might note at this juncture` r that paper. sheet 'material or thin board answers quite .satisfactorily indeed. Likewise, the conducting-part or ortion of each element may vary. Satis actory results have been obtained the utilization of foil, such' as tin-foil.

acli portion or part,

therefore, of'each member or element, as I have considered is thus flexible. Y,

With the foregoing observations, I will no'w describe more definitely the structure shown, `and will first refer to the illustration made by Figs.` 1 to 4 inclusive. There is a support lbase which may alsovary. That the same, of the condenser .shown is denoted by Qand is in the form of a disk -of wood or other proper substance. The base orsupport has'as shown fastened to its upper surface centrally thereof the disk B, the screwl 4 being shown to` hold said disk to the support 2. l

The body of the condenser' illustrated in these four views, which I am now-specifically. describing, is in the form of a plu- 6. These members 5 and 6 are in the form.

of hollow cylinders or tubes, the inner tube rality of'A members of which there are two .or cylinder 'rbeingseparated -b for in- I stance, 'a space 7 from the outer tu 5. Or dinarily theinner tube is rotatively adjustable `to vary capacity. yThe outer tube 5 at its'lower portionclosel surrounds the disk .The cylinder or tu 6 is ,Sustained by the disk 3 `andextends slightly above the cylinder 5.. y i

The -cylinders,. structurally:l speaking and otherwise as a matter of fact, are virtually duplicates of each otherso that a` description ofv one will apply to the other. der 5 consists of an outer or enveloping part as 8 of paper stock, and aninner part 9 of tin-foil, While the paper stock 8 wholly -in- The cylincloses the tin-foil, this may not alwaysv be necessary. The paper and tin-foil are usually adhesively united in some convenient way; -It will be seen, upon reference to Fig; 3, for instance, that the width or transverse extension of the tin-foil ply or sheet 9 is approximately equal to onehalf the circumferential extent of the tube 5. Although the paper stock wholly covers and incloses the tin-foil, this may not always be necessary. In this 'particular view the two tinfoil portions are shown in exact registration or dlreetly opposite each other, so that thereby I secure the maximum capacity of the condenser. By moving the tin-foil sheets out of register, the capacity of the condenser is reduced to zero; -this capacity may. obviously be adjusted to any point from zero to the maximum, by turning the tube 6 within the tube 5.

A terminal as 10 is connected electricallywith the tin-foil ply or sheet 9 of the outer tube while a somewhat similar terminal as 11 -is similarly connected with the tin-foil ply or sheet of the inner tube 6.

To turn the inner tube 6 for yregulation of capacity, any suitable means may be provided, for instance, that shown and now to be described. In the upper end of the inner tube 6 is set a head 12, for-example, ot wood, through which is threaded the spindle 14 having at its upper end a manipulating knob 15. By turning this knob the inner cylinder 6 may be likewise turned to adjust capacity.

The shank of a gage 16 may be fastened in some convenient way to the stationary or fixed'cylinder. the gage portion of the gage overhanging the head 12, and there beingl above it and cooperative therewith the pointer 17 fastened at its butt to the spindle or screw 14, the pointer,l as the spindle is turned, moving therewith and across the graduations 18'of the operative portion .or scale of the gage member 16. 4

In Figs. 5 and 6 I show a fiat construetion. The base in this type is denoted by 20 and the elements or members of the active condensing portion by 21 and 22 respectively. Inthis kind of 'condenser the meme ber 21 is practically of half disk formation, the member 22 being a complete disk. Said member 21 consistsof superposed half disks 23. and 24 of paper and an interposed half 'TWd'isk sheet 25 of tin-foil, the tin-foil being so disposed between the paper sheets 23 and 24 that there will be a selvage' or marginal portion of paper material entirely around the Vtin-foil. The adjustable member 22 of disk form is fastened to the spindle 26 supported for turning movement by the base 20. The spindle 26 has a manipulating knob or finger piece 27 at its other end to facilitate its adjustment. This spindle rotates freely in the member 21. Through the member 22 the spindle 26 vfixedly' extends. This memments of the condenser represented by the numeral 21 would present a practically fiat `upper surface because the half disk sheet 25 of tin-foil would be only .0015 inch thick.

The-lower face 23' of the upper-or adjustable element-s designated by the numeral ,22 would also have a substantially flat lower suo face which would practically engage the upper face 24 of the member 21. Therefore. the space 26 as shown in Fig. 6, if existing at all in practice. would be exceedingly minute.

p It will further be observed that the adjustable member 22 is, as a whole, flexible, and therefore readily conforms itself to any inequality in the upper surface of the member 21.

It is obvious that this form of condenser y may be so constructed that theY spindle 26 need not be vin electrical contact with either of thev active conducting plates of the condenser whieh may be provided with any form ot suitable terminals, not shown.

l. In Fig. 7 the condenser comprises members or elements as 30 and 31. These members or elements 30 and 31. except as to one point, to which I will later refer, are mounted .and operated almost exactly like the members or elements 5-and 6 which I have set forth so fully in detail. The supportingbase is denoted by 32. the element 30 being rigidwith it and the element 31 being turnable inthe part 30 through the agency for example of the knob These elements 30 and 31 are of tubular or-hollow constructionl the principal and in fact really the only` difference between them and the parts 5 and 6 being that the parts 30 and 3.1

nre of inverted frusto-conical form and are not therefore, cylindrical. In all ,three forms of the condenser it will be seen that ,the marginal portion of the paper` or equivalent material. overlics the foil so as to leave a margin or selvage of paper.

What I cla-im is:

1'. A condenser comprising a plurality of coaxial relatively turnably adjust-able elehaving insulating "and conducting sections, the respective conducting sections being wholly inclosed in the insulating sections and the marginal portions of the respective insulating sections extending outward beyond the marginal portions of the conductingsections. j

4. A.I condenser comprising coaxial relatively turnably adjustable elements, each of .paper stock and metalN foil.

5. A condenser comprising elements each of paper stock and metal foil andrelatively adjustable to vary the-capacity of the condenser.

6. A condenser comprising elements each of sheet paper stock and metal foil and relatively adjustable to vary the capacity of' the condenser. y

7. A- condenser comprising tubular elements, one inclosed by' another and each of paper ,stock a'nd metal foil.

8. A condenser comprising tubular coax ial elements each.v of paper and foil and relatively adjustable about their common axis. r w

9. A condensencomprising tubular elements, one inclosed by another and of aper stock and metal, the paper stock .inc osing the metal foil and the marginal portions thereof extending outward bevond the m ar" ginal portions of the foil, the elements'being relatively adjustable 'about their common' axis to vary thecapacity of the condenser.

10. A condenser comprising spaced coaxial tubular elements,`0ne inclosed by another, each of sheet paper and tin-foil, the sheet paper wholly inclosing the tin-foil and each of the paper portions of the'elements extending outward beyond the marginal portions` of the tin-foil, the elements being relatively adjustable about their common axis to vary j the capacity of the condenser.

11. A variable condenser comprising, a fiexible adjustable element comprising a conducting member, a fixed element having a conductin member provided with insulatingmateria on one side, and an insulating layer covering the other sidel of said last mentioned conducting member adjacentthe- `'14. A* variable condenser comprising, a

fixed element having a conductin layer and Vinsulating material secured to oth faces thereof, and a vflexible movablev element adapted to' be moved to vary the capacity` of the condenser.

15. In a variable condenser, a'fixed conducting element comprising'a sheet of foil. having a sheet'of'insulating material on one face and insulating material on its other face, and a flexible rotatable conducting element mounted adjacent to said sheet of insulating material. 1

16. In a condenser, a flexible movable ele- `ment comprising conducting material, and a' tubular fixed element comprising conducing material having 4solid insulating material covering its face adjacent the movable 0element. f

17. In a condenser, aflexible element comprising conducting material, another element of substantially tubular configuration comprisingconducting material and a cover- Ving of solid insulating material on its face adjacent the first named element, land means to vary the relation of the elements to vary the capacity. i i

18. A variable condenserv comprising, a flexible adjustable element lhaving 'a' conductin member, and a fixed element having a con ucting member provided with solid 05 insulation on one face thereof, and a layer of insulation attached to 'the other face vthereof?v adjacent to the adjustable element.

19. A variable condenser comprising, a fixed electrode having conducting material, 100 an insulating material wholly enclosing the conducting materiahanda flexible movable electrode. f .f

20. A variable condenser comprising,4 a

fixed electrode having a sheet of metallic material substantially contacting with said insulatinolayer and adapted to be moved to vary the capacity of the condenser.

22. A variable condenser comprisin a 'fixed conducting element, a layer of insu atin material thereupon, and a-flexible -mov-v ab e element having conducting lmaterial adapted to bemoved to vary the capacity of the condenser and adapted to contact upon'the said insulating material. f j' y j 23. In a variable condenser, a' fixed ele- I -'ment,. a dielectric member overlaying (said 125 fixed element, and a flexible-elementadapted to be moved to vary the capacity ofthe coni denser and arrangedto contact with thesurface of the said dielectric member.

24. In a vvariable condenser, a fixedele- 130 ment, a -dielectric Vmember overlaying said.

10 points, a flexible movable'element, means for changing the position of the movable ele'- ment for'varymg'the (capacity of thefcondenser, a calibrated scale carried b said support, and a polnter movlng wit said above mentioned means for co-operatm with said scale to indicate theadjustment o the condenser. y

In testimony whereof I aix -my signature.

CLARENCE D. -TUsKA-- 

